Vulnerability · Published May 6, 2025 · Assigned by GitHub_M
CVE-2025-46573passport-wsfed-saml2 Has SAML Authentication Bypass via Attribute Smuggling
High 8.6
In plain English
A high-severity improper authentication in passport-wsfed-saml2 from auth0. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 32% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
passport-wsfed-saml2 provides passport strategy for both WS-fed and SAML2 protocol. A vulnerability present starting in version 3.0.5 up to and including version 4.6.3 allows an attacker to impersonate any user during SAML authentication by tampering with a valid SAML response. This can be done by adding attributes to the response. Users are affected specifically when the service provider is using `passport-wsfed-saml2` and a valid SAML Response signed by the Identity Provider can be obtained. Version 4.6.4 contains a fix for the vulnerability.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| npm | passport-wsfed-saml2 | 4.6.4 | GHSA-8gqj-226h-gm8r |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| auth0 | passport-wsfed-saml2 | >= 3.0.5, < 4.6.4 |
Weakness: CWE-287 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N